diff --git a/src/compute.ts b/src/compute.ts
index 7f1fb79..473bad2 100644
--- a/src/compute.ts
+++ b/src/compute.ts
@@ -3,7 +3,7 @@ import { formatUnits } from '@ethersproject/units';
 import { register } from '@snapshot-labs/checkpoint/dist/src/register';
 import snapshotjs from '@snapshot-labs/snapshot.js';
 import { Mutex } from 'async-mutex';
-import { SCORE_API_URL } from './constants';
+import { COMPUTE_DELAY_SECONDS, SCORE_API_URL } from './constants';
 import { getSpace } from './hub';
 import { Delegate, Governance } from '../.checkpoint/models';
 
@@ -15,6 +15,7 @@ const DELEGATION_STRATEGIES = [
   'delegation-with-overrides'
 ];
 
+const lastCompute = new Map<string, number>();
 const mutex = new Mutex();
 
 // This function is called everytime governance information is queried from GraphQL API.
@@ -33,6 +34,14 @@ export async function compute(governances: string[]) {
     for (const governance of governances) {
       console.log('computing', governance);
 
+      const computedAt = lastCompute.get(governance) ?? 0;
+      const now = Math.floor(Date.now() / 1000);
+      if (now - computedAt < COMPUTE_DELAY_SECONDS) {
+        console.log('ignoring because of recent compute');
+        continue;
+      }
+      lastCompute.set(governance, now);
+
       const space = await getSpace(governance);
       const delegations = await snapshotjs.utils.getDelegatesBySpace(
         space.network,
diff --git a/src/constants.ts b/src/constants.ts
index 4f10142..7e8c645 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -1,3 +1,5 @@
 export const HUB_URL = process.env.HUB_URL ?? 'https://hub.snapshot.org';
 export const SCORE_API_URL =
   process.env.SCORE_API_URL ?? 'https://score.snapshot.org';
+
+export const COMPUTE_DELAY_SECONDS = 30 * 60; // 30 minutes